G. Sankarasubramanian et S. Rajasekaran, CONSTITUTIVE MODELING OF CONCRETE USING A NEW FAILURE CRITERION, Computers & structures, 58(5), 1996, pp. 1003-1014
A nonlinear hypoelastic constitutive relation has been proposed for th
e analysis of plane and axisymmetric reinforced concrete structures. E
quivalent uniaxial strain concept introduced by Darwin and Pecknold, a
nd the stress-strain curve for concrete proposed by Alexander have bee
n used. A new ultimate strength surface for concrete is proposed. The
back propagation algorithm of Rumelhart et al. [1] [D. E. Rumelhart, G
. E. Hinton and R. J. Williams, Learning representations by back-propa
gation errors. Nature 323, 533-536 (1986)] is used to train the artifi
cial neural network for experimental results of concrete and is used t
o describe the ultimate surface. Thus, a new failure criterion for con
crete is proposed. The proposed constitutive model is implemented in t
he user friendly finite element package ''FENLACS'' -(Finite Element N
onLinear Analysis of Concrete Structures). The capability of the model
to analyze a wide variety of structural engineering problems has been
observed. The user friendly features of FENLACS to study the nonlinea
r load deflection behavior, crack pattern and principal stress contour
s have also been illustrated.